rails4 rails-observers gem causes observed models to get loaded at startup

[inspire22]

Using spork, at startup now it's loading all my files referenced by observers.

The goal of spork is to only load the files at each test, so the latest changes are included.

Here's the caller[] block, but basically once environment is included, the observers load all models listed in config.active_record.observers.

spork-rails (4.0.0)
spork 1.0.0rc4

Suggestions welcome! I know spork tries to trap_method, but it's not working for me for some reason. I tried varying the placement in Gemfile but it didn't help

  pro ➤ spork
  Using RSpec, Rails
  Preloading Rails environment
  0.046477 startup
  Loading Spork.prefork block...
  Starting new test rails, 2014-03-04 18:42:38. Pid: 54449, heap: 600000
  [deprecated] I18n.enforce_available_locales will default to true in the future. If you really want to skip validation of your locale you can set I18n.enforce_available_locales = false to avoid this message.
  Loading group
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